90009-PP4-E01 Sealing (6MM) Bolt - Overview. The 90009-PP4-E01 sealing (6mm) bolt is a critical component designed specifically for Honda marine engine systems. It functions primarily as a sealing bolt, ensuring that connections within the fuel or fluid systems remain leak-proof and secure. By preventing fluid leaks, it helps maintain efficient operation and system integrity. Manufactured to exact factory specifications, this bolt guarantees seamless integration with existing parts, maintaining